Date
July 12, 2025, 11:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.801471] ================================================================== [ 16.801577] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 16.801629] Read of size 1 at addr fff00000c45d1ac8 by task kunit_try_catch/184 [ 16.801700] [ 16.801730] CPU: 1 UID: 0 PID: 184 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 16.801898] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.801927] Hardware name: linux,dummy-virt (DT) [ 16.802064] Call trace: [ 16.802165] show_stack+0x20/0x38 (C) [ 16.802260] dump_stack_lvl+0x8c/0xd0 [ 16.802353] print_report+0x118/0x5d0 [ 16.802399] kasan_report+0xdc/0x128 [ 16.802443] __asan_report_load1_noabort+0x20/0x30 [ 16.802494] kmalloc_uaf+0x300/0x338 [ 16.802535] kunit_try_run_case+0x170/0x3f0 [ 16.802655] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.802708] kthread+0x328/0x630 [ 16.802772] ret_from_fork+0x10/0x20 [ 16.802990] [ 16.803015] Allocated by task 184: [ 16.803097] kasan_save_stack+0x3c/0x68 [ 16.803142] kasan_save_track+0x20/0x40 [ 16.803190] kasan_save_alloc_info+0x40/0x58 [ 16.803237] __kasan_kmalloc+0xd4/0xd8 [ 16.803275] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.803314] kmalloc_uaf+0xb8/0x338 [ 16.803346] kunit_try_run_case+0x170/0x3f0 [ 16.803384] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.803428] kthread+0x328/0x630 [ 16.803460] ret_from_fork+0x10/0x20 [ 16.803636] [ 16.803756] Freed by task 184: [ 16.803824] kasan_save_stack+0x3c/0x68 [ 16.803867] kasan_save_track+0x20/0x40 [ 16.803905] kasan_save_free_info+0x4c/0x78 [ 16.803967] __kasan_slab_free+0x6c/0x98 [ 16.804005] kfree+0x214/0x3c8 [ 16.804233] kmalloc_uaf+0x11c/0x338 [ 16.804358] kunit_try_run_case+0x170/0x3f0 [ 16.804418] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.804497] kthread+0x328/0x630 [ 16.804550] ret_from_fork+0x10/0x20 [ 16.804585] [ 16.804850] The buggy address belongs to the object at fff00000c45d1ac0 [ 16.804850] which belongs to the cache kmalloc-16 of size 16 [ 16.804971] The buggy address is located 8 bytes inside of [ 16.804971] freed 16-byte region [fff00000c45d1ac0, fff00000c45d1ad0) [ 16.805070] [ 16.805127] The buggy address belongs to the physical page: [ 16.805230] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1045d1 [ 16.805304] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.805387] page_type: f5(slab) [ 16.805425] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 16.805476] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 16.805516] page dumped because: kasan: bad access detected [ 16.805556] [ 16.805574] Memory state around the buggy address: [ 16.805616] fff00000c45d1980: fa fb fc fc 00 05 fc fc fa fb fc fc fa fb fc fc [ 16.805672] fff00000c45d1a00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 16.805726] >fff00000c45d1a80: fa fb fc fc fa fb fc fc fa fb fc fc fc fc fc fc [ 16.805774] ^ [ 16.805811] fff00000c45d1b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.805866] fff00000c45d1b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.805905] ==================================================================
[ 13.212534] ================================================================== [ 13.214148] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 13.214400] Read of size 1 at addr ffff888102610b88 by task kunit_try_catch/201 [ 13.214624] [ 13.214721] CPU: 1 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 13.214768] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.214779] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.214800] Call Trace: [ 13.214814] <TASK> [ 13.214831] dump_stack_lvl+0x73/0xb0 [ 13.214860] print_report+0xd1/0x610 [ 13.214883] ? __virt_addr_valid+0x1db/0x2d0 [ 13.214907] ? kmalloc_uaf+0x320/0x380 [ 13.214926] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.214949] ? kmalloc_uaf+0x320/0x380 [ 13.214969] kasan_report+0x141/0x180 [ 13.215003] ? kmalloc_uaf+0x320/0x380 [ 13.215027] __asan_report_load1_noabort+0x18/0x20 [ 13.215051] kmalloc_uaf+0x320/0x380 [ 13.215476] ? __pfx_kmalloc_uaf+0x10/0x10 [ 13.215500] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 13.215654] ? trace_hardirqs_on+0x37/0xe0 [ 13.215685] ? __pfx_read_tsc+0x10/0x10 [ 13.215707] ? ktime_get_ts64+0x86/0x230 [ 13.215731] kunit_try_run_case+0x1a5/0x480 [ 13.215757] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.215782] ? queued_spin_lock_slowpath+0x116/0xb40 [ 13.215808] ? __kthread_parkme+0x82/0x180 [ 13.215829] ? preempt_count_sub+0x50/0x80 [ 13.215853] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.215877] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.215901] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.215927] kthread+0x337/0x6f0 [ 13.215946] ? trace_preempt_on+0x20/0xc0 [ 13.215968] ? __pfx_kthread+0x10/0x10 [ 13.216053] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.216075] ? calculate_sigpending+0x7b/0xa0 [ 13.216099] ? __pfx_kthread+0x10/0x10 [ 13.216120] ret_from_fork+0x116/0x1d0 [ 13.216139] ? __pfx_kthread+0x10/0x10 [ 13.216174] ret_from_fork_asm+0x1a/0x30 [ 13.216204] </TASK> [ 13.216215] [ 13.228121] Allocated by task 201: [ 13.228324] kasan_save_stack+0x45/0x70 [ 13.228521] kasan_save_track+0x18/0x40 [ 13.228691] kasan_save_alloc_info+0x3b/0x50 [ 13.228883] __kasan_kmalloc+0xb7/0xc0 [ 13.229675] __kmalloc_cache_noprof+0x189/0x420 [ 13.229860] kmalloc_uaf+0xaa/0x380 [ 13.229990] kunit_try_run_case+0x1a5/0x480 [ 13.230409] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.230653] kthread+0x337/0x6f0 [ 13.230818] ret_from_fork+0x116/0x1d0 [ 13.231039] ret_from_fork_asm+0x1a/0x30 [ 13.231222] [ 13.231321] Freed by task 201: [ 13.231465] kasan_save_stack+0x45/0x70 [ 13.231642] kasan_save_track+0x18/0x40 [ 13.231819] kasan_save_free_info+0x3f/0x60 [ 13.232154] __kasan_slab_free+0x56/0x70 [ 13.232355] kfree+0x222/0x3f0 [ 13.232503] kmalloc_uaf+0x12c/0x380 [ 13.232655] kunit_try_run_case+0x1a5/0x480 [ 13.232836] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.233141] kthread+0x337/0x6f0 [ 13.233307] ret_from_fork+0x116/0x1d0 [ 13.233481] ret_from_fork_asm+0x1a/0x30 [ 13.233661] [ 13.233750] The buggy address belongs to the object at ffff888102610b80 [ 13.233750] which belongs to the cache kmalloc-16 of size 16 [ 13.235256] The buggy address is located 8 bytes inside of [ 13.235256] freed 16-byte region [ffff888102610b80, ffff888102610b90) [ 13.235820] [ 13.235898] The buggy address belongs to the physical page: [ 13.236718] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102610 [ 13.237289] flags: 0x200000000000000(node=0|zone=2) [ 13.237515] page_type: f5(slab) [ 13.237671] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 13.238029] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 13.238342] page dumped because: kasan: bad access detected [ 13.238564] [ 13.238650] Memory state around the buggy address: [ 13.238856] ffff888102610a80: 00 04 fc fc 00 01 fc fc 00 01 fc fc 00 04 fc fc [ 13.239208] ffff888102610b00: 00 04 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 13.239506] >ffff888102610b80: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.239794] ^ [ 13.239950] ffff888102610c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.240386] ffff888102610c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.240678] ==================================================================